Andy,

I found a good link about Kinetico product's spec:

http://www.clearwaternow.ca/MachPerf...eDatasheet.pdf

Do you have similar spec file for Q237? I have 2040S in the link above. If the sales is honest, the Q237 should be same as 2025S, from the spec, 2025s is not bad though, even the efficiency is not high as 2040S. They has $500 difference here